Southbound over the East coast of Florida en-route to Key Largo (Ocean Reef Club Airport). Here is a view of Launch Complex 39 (picture from the ground off Wikipedia) It encloses a total area of 130,000,000 square feet !!! No wonder they put that sucker in Florida, imagine the heating bill if it was up North !
It's in the GPS database and according to AirNav.com it has civilian traffic. I am sure you have to arrange your visit ahead of time though.
The next space shuttle to leave this pad will be Atlantis as STS-117 this May.